:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;--bg-primary: #3d1a1a;--bg-secondary: #2d1212;--text-primary: rgba(255, 255, 255, .92);--text-secondary: rgba(255, 255, 255, .7);--tomato: #e74c3c;--tomato-dark: #c0392b;--success: #2ecc71;--info: #3498db;--border-color: rgba(255, 255, 255, .15);--shadow: 0 4px 12px rgba(0, 0, 0, .4);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:light){:root{--bg-primary: #fff5f5;--bg-secondary: #ffebee;--text-primary: #4a1a1a;--text-secondary: #7a2a2a;--border-color: rgba(139, 0, 0, .15);--shadow: 0 4px 12px rgba(139, 0, 0, .15)}}*{box-sizing:border-box}body{margin:0;display:flex;justify-content:center;align-items:center;min-width:320px;min-height:100vh;background-color:var(--bg-primary);color:var(--text-primary)}#app{width:100%;max-width:600px;padding:1.5rem}.timer-app{display:flex;flex-direction:column;align-items:center;gap:2rem;position:relative}.app-header{text-align:center;width:100%}.app-header h1{font-size:clamp(2rem,5vw,3rem);font-weight:700;margin:0 0 .5rem;color:var(--tomato)}.session-count{display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:clamp(.875rem,2vw,1rem);color:var(--text-secondary)}.session-count span:first-child{font-weight:600;color:var(--text-primary);font-size:clamp(1.125rem,2.5vw,1.5rem)}.timer-main{display:flex;flex-direction:column;align-items:center;gap:1.5rem;width:100%}.session-indicator{font-size:clamp(1.125rem,2.5vw,1.5rem);font-weight:600;text-transform:uppercase;letter-spacing:.1em;transition:color .3s ease;color:var(--tomato)}.timer-display{position:relative;width:clamp(200px,50vw,280px);height:clamp(200px,50vw,280px)}.progress-ring{width:100%;height:100%;transform:rotate(-90deg)}.progress-ring-bg{stroke:var(--border-color);stroke-width:8}.progress-ring-circle{stroke:var(--tomato);stroke-width:8;transition:stroke-dashoffset .5s ease,stroke .3s ease}.time-display{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:clamp(2.5rem,7vw,4rem);font-weight:700;font-variant-numeric:tabular-nums;color:var(--text-primary)}.controls{display:flex;gap:.75rem;flex-wrap:wrap;justify-content:center;width:100%}.btn{min-height:48px;min-width:120px;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;font-family:inherit;border:none;border-radius:12px;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn:focus-visible{outline:3px solid var(--tomato);outline-offset:2px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--tomato);color:#fff;box-shadow:0 2px 8px #e74c3c4d}.btn-primary:hover:not(:disabled){background-color:var(--tomato-dark);transform:translateY(-1px);box-shadow:0 4px 12px #e74c3c66}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background-color:var(--bg-secondary);color:var(--text-primary);border:2px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background-color:var(--border-color)}.btn-tertiary{background-color:transparent;color:var(--text-secondary);border:none}.btn-tertiary:hover:not(:disabled){color:var(--text-primary);background-color:var(--border-color)}.btn-settings{position:absolute;top:1rem;right:1rem;width:48px;height:48px;padding:0;background-color:var(--bg-secondary);border:2px solid var(--border-color);border-radius:12px;font-size:1.5rem;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;z-index:10}.btn-settings:hover{background-color:var(--border-color);transform:rotate(90deg)}.btn-settings:focus-visible{outline:3px solid var(--tomato);outline-offset:2px}.modal{position:fixed;inset:0;background-color:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease,visibility .3s ease}.modal.show{opacity:1;visibility:visible;pointer-events:auto}.modal-content{background-color:var(--bg-secondary);border-radius:16px;box-shadow:var(--shadow);max-width:400px;width:100%;overflow:hidden;transform:scale(.95);transition:transform .3s ease}.modal.show .modal-content{transform:scale(1)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.25rem;border-bottom:1px solid var(--border-color)}.modal-header h2{margin:0;font-size:1.25rem;font-weight:600}.btn-close{width:36px;height:36px;padding:0;background-color:transparent;border:none;border-radius:8px;font-size:1.25rem;color:var(--text-secondary);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.btn-close:hover{background-color:var(--border-color);color:var(--text-primary)}.modal-body{padding:1.5rem;display:flex;flex-direction:column;gap:1.25rem}.setting-group{display:flex;flex-direction:column;gap:.5rem}.setting-group label{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.setting-group input[type=number]{width:100%;padding:.75rem;font-size:1rem;font-family:inherit;background-color:var(--bg-primary);border:2px solid var(--border-color);border-radius:8px;color:var(--text-primary);transition:border-color .2s ease}.setting-group input[type=number]:focus{outline:none;border-color:var(--tomato)}.setting-group input[type=checkbox]{width:20px;height:20px;margin-right:.75rem;cursor:pointer}.checkbox-label{display:flex;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none;font-size:.875rem;font-weight:500;color:var(--text-secondary)}.checkbox-label input:disabled+span{opacity:.5}.modal-footer{padding:1.25rem;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end}@media(max-width:480px){#app{padding:1rem}.controls{flex-direction:column;width:100%}.btn{width:100%}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms;animation-iteration-count:1;transition-duration:.01ms}}#pwa-toast{visibility:hidden;position:fixed;right:0;bottom:0;margin:16px;padding:12px;border:1px solid var(--border-color);border-radius:8px;z-index:1001;text-align:left;box-shadow:var(--shadow);display:grid;background-color:var(--bg-secondary);color:var(--text-primary);max-width:320px}#pwa-toast .message{margin-bottom:8px}#pwa-toast .buttons{display:flex;gap:8px}#pwa-toast button{border:1px solid var(--border-color);outline:none;margin-right:5px;border-radius:6px;padding:6px 12px;font-family:inherit;cursor:pointer;background-color:var(--bg-primary);color:var(--text-primary);transition:background-color .2s ease}#pwa-toast button:hover{background-color:var(--border-color)}#pwa-toast.show{visibility:visible}button#pwa-refresh{display:none}#pwa-toast.show.refresh button#pwa-refresh{display:block}